I have 4 distribution lists, each with 80-90 names, that I use to send news updates etc to members of a club.
Recently messages have gone immediately to lists 1 and 2 but do not go to 3 and 4 unless I hit Send several times. This evening 1 and 2 went no problem but 3 and 4 will not go no matter how many times I hit Send.
I've been doing this for quite a few years and it's a new problem. No trouble with any other messages.